215061116666 has 32 divisors (see below), whose sum is σ = 354379536000. Its totient is φ = 97072713280.

The previous prime is 215061116587. The next prime is 215061116689. The reversal of 215061116666 is 666611160512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3159560 + ... + 3226908.

It is an arithmetic number, because the mean of its divisors is an integer number (11074360500).

Almost surely, 2^215061116666 is an apocalyptic number.

215061116666 is a deficient number, since it is larger than the sum of its proper divisors (139318419334).

215061116666 is a wasteful number, since it uses less digits than its factorization.

215061116666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68374.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 215061116666 in words is "two hundred fifteen billion, sixty-one million, one hundred sixteen thousand, six hundred sixty-six".